class_docstr: State machine that computes the next state of a test based on the current state and
  perform actions accordingly during the state transition. For example:
  - passing -[two last results failed]-> failing: create github issue
  - failing -[last result passed]-> passing: close github issue
  - jailed -[latest result passed]-> passing: update the test's oncall
  ...
code: def _init_ray_buildkite(cls):
      if not cls.ray_buildkite:
          buildkite_token = get_secret_token(AWS_SECRET_BUILDKITE)
          cls.ray_buildkite = Buildkite()
          cls.ray_buildkite.set_access_token(buildkite_token)
  
imports: import abc
  from github import Github
  from pybuildkite.buildkite import Buildkite
  from ray_release.test import Test, TestState
  from ray_release.aws import get_secret_token
label_desc: Use image node_id 4 for calling the TestStateMachine obj's underlying member method code with example usage: obj._init_ray_buildkite(cls) without return types